monitoring: add initial stack with grafana, loki, and promtail

roles/docker_host/tasks/main.yml

@@ -19,6 +19,12 @@
     mode: "0644"
   register: docker_daemon_config
 
+- name: Install Docker loki plugin for logs
+  community.docker.docker_plugin:
+    plugin_name: grafana/loki-docker-driver:latest
+    alias: loki
+    state: enable
+
 - name: Remove docker0 from firewalld trusted zone
   become: yes
   firewalld:
@@ -50,6 +56,12 @@
     networks: yes
   when: clean_desired is true
 
+- name: Clean alpina directory
+  file:
+    path: "{{ my_svc_path }}"
+    state: absent
+  when: clean_desired is true
+
 - name: Restart Docker daemon
   become: yes
   service:

roles/docker_host/templates/daemon.json.j2

@@ -1,4 +1,10 @@
 {
     "ipv6": true,
-    "fixed-cidr-v6": "{{ docker_ipv6_subnet | ansible.utils.ipsubnet(80, 0) }}"
+    "fixed-cidr-v6": "{{ docker_ipv6_subnet | ansible.utils.ipsubnet(80, 0) }}",
+    "log-driver": "loki",
+    "log-opts": {
+        "loki-url": "http://localhost:3100/loki/api/v1/push",
+        "loki-batch-size": "400",
+        "loki-retries": "5"
+    }
 }